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//*****************************************************************************
//
// iso14443-4.c - ISO 14443-4 implementation.
//
//
// Copyright (c) 2014 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.
//
//*****************************************************************************
#include <string.h>
#include "inc/hw_types.h"
#include "driverlib/sysctl.h"
#include "trf7960.h"
//*****************************************************************************
//
// Transceive ISO 14443-4 RATS command.
//
//*****************************************************************************
int
ISO14443RATS(unsigned char ucFSDI, unsigned char ucCID, unsigned char *pucATS)
{
unsigned char pucResponse[16];
unsigned int uiRxSize;
unsigned char pucRATS[2];
int i;
uiRxSize = sizeof(pucResponse);
//
// RATS command.
//
pucRATS[0] = 0xE0;
pucRATS[1] = (ucFSDI << 4) || ucCID;
//
// Transmit RATS, receive ATS.
//
TRF7960Transceive(pucRATS, sizeof(pucRATS), 0, pucResponse, &uiRxSize, NULL,
TRF7960_TRANSCEIVE_CRC);
if(uiRxSize >= 3)
{
//
// Valid ATS received, return it as an char buffer. Was transmitted LSByte first.
// pucResponse[0] is the length of the transmitted ATS, including TL byte, NOT including
// two CRC bytes
//
for(i = 0; i < pucResponse[0]; i++)
pucATS[i] = pucResponse[i];
return(uiRxSize);
}
else
{
return(0);
}
}
//*****************************************************************************
//
// Transceive ISO 14443-4 PPS command.
// ucCID must between 0~14, ucDRI & ucDSI must between 0~3
//
//*****************************************************************************
int
ISO14443PPS(unsigned char ucCID, unsigned char ucDRI, unsigned char ucDSI)
{
unsigned char pucResponse[3];
unsigned int uiRxSize;
unsigned char pucPPS[3];
uiRxSize = sizeof(pucResponse);
//
// PPS command.
//
pucPPS[0] = (0xD << 4) | ucCID;
pucPPS[1] = 0x11; // PPS1 is transmitted
pucPPS[2] = (ucDSI << 2) | ucDRI;
//
// Transmit PPS, receive PPS response.
//
TRF7960Transceive(pucPPS, sizeof(pucPPS), 0, pucResponse, &uiRxSize, NULL,
TRF7960_TRANSCEIVE_CRC);
//
// check if receive the first byte of the response is PPSS
//
if(pucResponse[0] == pucPPS[0])
return(1);
else
{
//
// Not valid response
//
return(0);
}
}
//*****************************************************************************
//
// Transceive ISO 14443-4 DESELECT command.
// ucCID must between 0~14, ucDRI & ucDSI must between 0~3
//
//*****************************************************************************
int
ISO14443DESELECT(unsigned char ucCID)
{
unsigned char pucResponse[2];
unsigned int uiRxSize;
unsigned char pucDESELECT[2];
uiRxSize = sizeof(pucResponse);
pucResponse[0] = 0;
pucResponse[1] = 0;
//
// DESELECT command.
//
pucDESELECT[0] = 0xCA; // S-block with DESELECT set and CID following
pucDESELECT[1] = ucCID & 0x0F;
//
// Transmit DESELECT, receive DESELECT response.
//
TRF7960Transceive(pucDESELECT, sizeof(pucDESELECT), 0, pucResponse, &uiRxSize, NULL,
TRF7960_TRANSCEIVE_CRC);
//
// check if receive the first byte of the response is DESELECT
// check if the second byte contains the same CID
//
if(pucResponse[0] == pucDESELECT[0])
{
return(1);
}
else
{
//
// Not valid response
//
return(0);
}
}
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